body,html
  line-height :1
  font-weight :200
  font-family:'PingFang SC','STHeitiSC-Light','helvetica-Light',Arial,sans-serif


.clearfix
  display :inline-block
  &:after
    display :block
    content :'.'
    height :0
    line-height :0
    clear :both
    visibility :hidden



@media (-webkit-min-device-pixel-ratio: 1.5),(min-device-pixel-ratio: 1.5)
 .border-1px
   &::after
      -webkit-transform :scaleY(0.7)
      transform :scaleY(0.7)

@media (-webkit-min-device-pixel-ratio: 2),(min-device-pixel-ratio: 2)
  .border-1px
    &::after
      -webkit-transform :scaleY(0.5)
      transform :scaleY(0.5)
